Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((hanh trang) or (hanh trinh)) luan dang cong tan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh trang) OR (hanh trinh)) luan dang cong tan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh trang) or (hanh trinh)) luan dang cong tan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh trang) or (hanh trinh)) luan dang cong tan ((toan cao) OR (toan ban))*.